The GESALT Workbench is a WWW-based tool for genomic sequence analysis, comparisn and annotation, with strong emphasis on visualization. GESALT integrates graphically the output of diverse sequence analysis algorithms producing an information-rich, interactive genomic map. Availability: The GESALT Workbench, as well as a more detailed description, are available at http://bioinfo.weizmann.ac.il/GESALT/. ContactL Gustavo @ bioinfo.weizmann.ac.il, Doron.Lancet @ weizmann.ac.il.